> retail sales of electricity to California end-use customers and 100% of electricity procured to serve all state agencies

From this I take they don't plan to necessarily eliminate all carbon emitting energy sources but rather just the ones used to produce electricity. This would make the goal a little more achievable but also makes it a moving target. As different industries move from burning carbon based fuel to electricity the demand also increases which will still affect the balance between clean and dirty energy.

There are plans to ban ICE engines and other fuel burning applications so the demand for electricity will see a sharp rise. It's more that achievable to be 100% green in 2045 assuming the energy consumption trend of the past. But the future will probably see that trend go from relatively linear to something exponential for at least a few decades until the switch is done. Covering that difference will be the real challenge.

Note how it's end-user consumers (and government offices). So it won't hurt CA's business users, cause them to relocate to other states.

As always, devil's in the details. In the meantime, the headline looks impressive, which is frankly all these critters care about.

I read end-users as simply customers that intend to consume the electricity in CA as opposed to those who buy it to potentially resell it across state borders. This will probably be cleared up later.